mainsource-it.ru.	30 IN SOA ns1.smartape.ru. support.smartape.ru. (
				2021092200 ; serial
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

mainsource-it.ru.	30 IN TXT "v=spf1 ip4:185.9.147.4 ip4:185.9.147.4 a mx ~all"

mainsource-it.ru.	30 IN A	185.9.147.4
mainsource-it.ru.	30 IN AAAA 2a06:dd00:1:4::28

Mail exchangers:
mainsource-it.ru.	30 IN MX 10 mail.mainsource-it.ru.
mainsource-it.ru.	30 IN MX 20 mail.mainsource-it.ru.

Name servers:
mainsource-it.ru.	30 IN NS ns2.smartape.ru.
mainsource-it.ru.	30 IN NS ns1.smartape.ru.